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Cisco AVVID Network Infrastructure Enterprise Quality of Service Design
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Chapter 3 QoS in an AVVID-Enabled Campus Network
Selecting a Distribution-Layer Switch
Verifying the Configuration
On the Catalyst 3550 access-layer switch, you can verify the configuration and performance during
periods of high congestion by examining the output of the following commands:
Example 3-25 Displaying the QoS CoS- Mapping Information
3550G-Dist#show mls qos maps
Cos-dscp map:
cos: 0 1 2 3 4 5 6 7
--------------------------------
dscp: 0 8 16
26 34 46 48 56
Example 3-26 Displaying QoS Queuing Strategy
3550G-Dist#show mls qos interface queueing
GigabitEthernet0/1
Ingress expedite queue: dis
Egress expedite queue: ena
wrr bandwidth weights:
qid-weights
1 - 25
2 - 25
3 - 25
4 - 25 when expedite queue is disabled
Dscp-threshold map:
d1 : d2 0 1 2 3 4 5 6 7 8 9
---------------------------------------
0 : 01 01 01 01 01 01 01 01 01 01
1 : 01 01 01 01 01 01 01 01 01 01
2 : 01 01 01 01 01 01 01 01 01 01
3 : 01 01 01 01 01 01 01 01 01 01
4 : 01 01 01 01 01 01 01 01 01 01
5 : 01 01 01 01 01 01 01 01 01 01
6 : 01 01 01 01
Cos-queue map:
cos-qid
0 - 1
1 - 1
2 - 2
3 - 2
4 - 3
5 - 4
6 - 4
7 - 4
Command
Description
See
show mls qos maps
Displays the QoS CoS mapping information.
show mls qos interface queueing
Displays the QoS queuing strategy.
show policy-map interface
Displays statistics and configurations of input
and output policies attached to an interface.
show mls qos interface interface
Displays QoS information for the specified
interface.